Synchronous rectification controller in SC-74
The NXP TEA1999TS/2H is a GreenChip™ synchronous rectification controller in a 6-pin SC-74 (SOT-457) surface-mount package. It drives an external MOSFET to replace the output diode in a flyback or resonant converter, cutting the rectifier's conduction loss by replacing the diode's forward drop with the FET's Rds(on). Supply current is 250 µA, and the supply voltage range spans 0 V to 21 V, so the controller can be biased directly from the converter's output rail or an auxiliary winding without a separate regulator.
Temperature grade and board-fit constraints
The 150°C TJ max means the part can sit next to a hot transformer or a switching FET on the same board without forced airflow, as long as the board's thermal resistance keeps the junction below that ceiling. The SC-74 package (SOT-457) is a 6-lead, 2.9 mm × 1.6 mm body with a 0.95 mm pitch.
Lifecycle and compliance status
NXP lists the TEA1999TS/2H as an active product with ROHS3 compliance.